Method and device for erasing and writing on magnetic recording

Details Method and device for erasing and writing on magnetic recording Method and device for erasing and writing on magnetic recording

1990-08-23

1994-05-31

Fuller, Benjamin R.

Recorders

Magnetographic

Physical reorientation of magnetic particles

346 21, 346 745, G11B 900

Patent

active

053173406

ABSTRACT:
Method and devices for erasing and writing on magnetic particle oriented media are described. Erasure is caused by moving a magnetic field which enters and exits the media at a finite angle but stays parallel to the media in some region. A magnetic stencil comprising regions of dissimilar permeabilities is described. The magnetic stencil can be used in conjunction with the erasure means to simultaneously create alternating fields parallel and normal to the media thereby permitting information to be written over any previously recorded information without requiring a seperate erasure step.

REFERENCES:
patent: 3613101 (1971-10-01), Leonard et al.
patent: 3633720 (1972-01-01), Tyler
patent: 3699587 (1972-10-01), Currie
patent: 3845499 (1974-10-01), Ballinger
patent: 3860796 (1975-01-01), Wallace et al.
patent: 3879754 (1975-04-01), Ballinger
patent: 3947879 (1976-03-01), Stuuffer
patent: 4157581 (1979-06-01), Keiichi et al.
patent: 4323933 (1982-04-01), Fichter
patent: 4366488 (1982-12-01), Westwood et al.
patent: 4646107 (1987-02-01), Shimizu et al.
patent: 4675476 (1987-06-01), Kobayashi
patent: 5095317 (1992-03-01), Takei
patent: 5109311 (1992-04-01), Hanazono et al.
patent: 5119255 (1992-06-01), Gooch
Dale O. Ballinger, "Magnetic Recording Paper is Erasable", Electronics, Mar. 1, 1973, McGraw Hill, 1221 Avenue of the Americas, New York, N.Y.
Guide to Writing and Erasing POP Magnetic Paper Available from Eurand America Inc., 845 Center Drive, Vandalia, Ohio 45377.

Affiliated with

Also associated with

Rating

Method and device for erasing and writing on magnetic recording does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for erasing and writing on magnetic recording , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for erasing and writing on magnetic recording will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1630808